400682866 has 4 divisors (see below), whose sum is σ = 601024302. Its totient is φ = 200341432.

The previous prime is 400682833. The next prime is 400682869. The reversal of 400682866 is 668286004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 355511025 + 45171841 = 18855^2 + 6721^2 .

It is not an unprimeable number, because it can be changed into a prime (400682869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100170715 + ... + 100170718.

Almost surely, 2^400682866 is an apocalyptic number.

400682866 is a deficient number, since it is larger than the sum of its proper divisors (200341436).

400682866 is a wasteful number, since it uses less digits than its factorization.

400682866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200341435.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 400682866 is about 20017.0643701818. The cubic root of 400682866 is about 737.2253446677.

The spelling of 400682866 in words is "four hundred million, six hundred eighty-two thousand, eight hundred sixty-six".